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取一根长约12厘米～14厘米的圆铜管。直径约0.5厘米左右(用废教鞭圆珠笔上的一节细铜管亦可),将钢管的一端压扁、合缝,再用氧炔焰将压扁端烧结。削制一根长为8厘米左右的竹质杆子,其直径比铜管直径略细。买一些小鞭炮,将鞭炮内的火药和药线取出。〈演示方法一〉将一端开口的圆铜管用两根细线吊起呈水平。取四或五只小鞭炮内的火药装入铜管内,再取一根小鞭炮的药线,将其一半塞进钢管的开口端,另一半留在管
Take a round copper tube about 12 cm to 14 cm long. About 0.5 cm in diameter (a thin copper tube on a ballpoint pen can be used), flatten and sew one end of the tube, and then squash it with an oxy-acetylene flame. Cut a bamboo rod about 8 centimeters long, with a diameter slightly smaller than the diameter of the copper tube. Buy some small firecrackers and take out the gunpowder and medicine line inside the firecrackers. A round copper tube with one end opened was lifted horizontally with two thin wires. Take the gunpowder in four or five small firecrackers into a copper tube, take a small firecracker’s drug line, and insert one half into the open end of the steel tube, leaving the other half in the tube.